<!DOCTYPE html>
<html lang="zh-CN">

<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
  <style>
    /* 找到type属性等于text的标签 */
    input[type="text"] {
      background-color: skyblue;
    }

    input[type="password"] {
      background-color: orange;
    }

    /* 找到input中有type属性的标签 */
    input[type] {
      background-color: orange;
    }
  </style>
</head>

<body>
  姓名：<input type="text"><br><br>
  密码：<input type="password" name="" id="">
</body>

</html>